Curium

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  curium \curium\ n. [after Pierre and Marie Curie.]
     a radioactive transuranic element of atomic number 96, having
     an atomic weight of 247 for its most stable isotope
     (half-life 1.6 x 10^{7} years). The chemical symbol is Cm.
  
     Note: It was first prepared in 1944 by helium-ion bombardment


           of plutonium in a cyclotron by Glenn Seaborg and
           colleagues in California. It has never been detected in
           nature, though minute quantities may exist in uranium
           deposits as a consequence of the neutron flux there.
  
     Syn: Cm, atomic number 96.
          [WordNet 1.5]

From WordNet (r) 2.0 [wn]:

  curium
       n : a radioactive transuranic metallic element; produced by
           bombarding plutonium with helium nuclei [syn: {Cm}, {atomic
           number 96}]

From Elements database 20001107 [elements]:

  curium
  Symbol: Cm
  Atomic number: 96
  Atomic weight: (247)
  Radioactive metallic transuranic element. Belongs to actinoid series.
  Nine known isotopes, Cm-247 has a half-life of 1.64*10^7 years. First
  identified by Glenn T. Seaborg and associates in 1944, first produced by
  L.B. Werner and I. Perlman in 1947 by bombarding americium-241 with
  {neutron}s. Named for Marie Curie.